Fumaric acid is an organic substance widely used as a food additive. Its elemental composition is 41.4% C , 3.5%H , and 55.1% O. A solution made by dissolving 0.1500 g of fumaric acid in water and diluting to a volume of 100.0 mL gave rise to an osmotic pressure of 240.3 mmHg at 298 K. On titration of a sample weighing 0.573g , 94.1mL of 0.105 MNaOH was required to reach an equivalence point. Fumaric acid reacts with 1 mol ofHCl to give an addition product and with 1 mol of H2 to give a reduction product.
what is the empirical formula of fumaric acid?
what is the molecular mass of fumaric acid?